Sheet-metal container.



PATENT@ D50. s1, 1907.

5, BRBNZHJGBR. SHEET METAL GQNTMNBR..

lAPPLIGAll'ON FILED DEG. 24.1906.

PATENTED DEC. 3l, 190'?. J. BRENZlNG-BR. SHEET METAL CONTAINERI APPLICATION FILED 1330.24.1906.

2 SHEETS--SHEBT Z.

W/rA/ESSES tween the to To all inkom it may concern.'

are considered more desirable. tops and bottoms of the so-called square urrTTan sTaTns PATENT ortica ULUS BRENZINGER, OF MOUNT VERNON, NW YORIQ'ASSIGNORITO MAX AMS MACHINE COMPANY, OF MOUNT VERNON, NEW. YORK, A CORPORATION OF NEW YORK.

SIRET-METAL CONTAINER.

no, erasing'.

Specification of Letters Patent.

4Patented Dec. 31', 1907.

Application filed December 24, i906. Serial No. 349,231'.

Be it known that I, JULIUs BRENZINGER, a citizen of the United States, residing at Mount Vernon, in the county of Westchester and State of New York, have invented certain new and useful Improvements in'Sheet lil/ fetal Containers, of which the following is a specification. y i

rllliis invention relates to sheetemetal containers, such as are known in general parlance as. ftinfcans and more articularl 7 to improvements in the construction of the body )ortion of such containers. x

in t e manufacture of the ordinary cylindrical 4or rount cans, there is little diffi culty in securing a strong and tight joint beor bottom and the side walls of the can, either by the old process of soldering or in the more modern manner of double-seeming. For many purposes, however, cans of substantially rectangular configuration, generally referred to as square cans and preferably having rounded corners, While the cans may be readily secured and sealed to the previouslyeforrned side walls in the old manner of soldering, true double-seaming is more difficult-1f possible at all for commer- .cial purposes in a machine-made can-f.

in the manufacture' of round cans, the

cylindrical can-body is first formed from a suitable blank, after which a fiange is turned at the top and bottom edges thereof. In the"doubleseaming operation, this flange is rolled or folded to interlock with the edge of the top or bottom disk, which is compressed therewith into a substantially solid bead comprising portions of both sides and ends.

This flange, prior tothe double-seaming operation, projects rectangularly outward, from the can body, and while such a fiange may readily be turned at the edges of a cylinder of sheet-metal, where the curvature is gentle, it cannot .be so turned at sharply rounded corners where the abrupt edge-wise bend of the metal will'fracture the samel objectionable for obvious reasons-when the urposes of double-seaming are considered. it would' be similarly impracticable to attempt to flange the blank before the latter has been formed into a substantially rectan guiar can-body, in-as-much as the operation of forming a fianged blank would result in l the same-oneven `more pronounced- -ed ge* wise bend of the metal strip constituting the flange and ultimate fracture thereof. The difiicul ties incident to double-seaminof in the manufacture of squa're7 cans, in the generally-accepted means of true double-seaming, will be therefore apparent.

In true double-seeming, las is well known,

there is positive interlocking between top (or bottom) yand sides, and, when properly by the intcriorly-turned edge of the top or' bottom and by the double-seaming operation becoming interlocked therewlth, the

folded or hooked .edge of the top or bottom is folded down against the sides of the can? body and compressed thereagainst, 'the oint being made tight and strengthened by soldering. p

,The present v invention contemplates a structure wherein the integral side walls of a substantially rectangular can body are joined to the top and bottom or end-portions -by double-seeming along contiguous edges which form substantially right lines, and at the rounded corners alone by false doubleseaming, the latter with or withoutsoldering. Inthis manner, I not only strengthen by true double-seaming the flat sides of the can, ordinarily the weakest parts of the walls,l

and consequently, therefore', ofthe joint, re-

sorting to false double-seaming at the corners only, which are naturally stronger and more rigid on account of the curvature, but I may utilize the same machine and the same operation to effect both forms of connections.'

My invention will be more readily understood by reference' .to the accompanying drawings, forming apart of this specification,

in which Ifhave selected for the purposes of illustration and shown a welllknown form of rectangular-shaped, round-cornered can, and in which Y j Figure lis a perspective view of a blank .from which the body of the can'may be formed; Fi 2 is a perspective view of the formed canody, before the top and bottom,

or end portions,'have been applied thereto; Fig. 3 is a perspective view of the completed can Fig. 4 is a top plan view of Fig. 3; Figs.

'5 and 6 are vertical sections taken, respectively, on the lines 5--5 and 6 6 of Fig. 4, and Figs. 7 and 8 are detailed sectional views illustrating the 'successive steps of the true double-seaming andthe false double-seam* ing processes, respectively.

Referring now tothe drawings in detail, numeral 9 refers to a'blank cut to proper size 4and configuration from suitable sheet-metal,

such as tin plate. As shown in Fig. 1,this blank 9 is of rectangular configuration, and is provided with a series of recesses 10 10 in each of the opposite longer edges thereof. This blank 9 is adapted to be formed into the body portion of the can, the shorter edges 11 11 thereof being joined in any suitable manner, either by a soldered lap-seam, 'as shown, or by a side lock-seam, if desired, as would be possible in a can embodying my invention..

As shown in Fig. 2, the can-body is designed to be of substantially rectangular con-v figuration, with rounded corners 12 `-1 2, and to this shape the blank 9 is formed, the recesses 10 10 being so spaced in the blank as to be symmetrically located at the corners of the can-body whenformed, and thelengthof each recess being substantially equal to the arc of4 curvature at the rounded corner. The cutting -of these recesses 10 10 leaves the series of projectingportions 13 13 of the edges,

which are, in the forming operation, bent over substantially at right angles to the sides of the can-body to 'form flanges which extend throughout the straight portion only of each side edge'. In other lwords, both top and bottom edge is provided with a flange which is cut away at the rounded corners. The canbody is now ready for thelapplication of the top andbottom, orend portions. IIt being of the essence of my invention to avail myself, in the manufacture of square or rectangular cans, so far as possible, of the advantages of double-seaming, I employ for these end portions formed plates similar in all except conguration tothe top and bottom disks which are doubleseamcd tothe body portions of the ordinary round cans. With the exception of the aperture for the spout or neck 14, the top plate or end` portion 1.5 is

similar in all respects to the bottom plate or end portion 16, each being of rectangular configuration, with cornersrounded to cor-i respond to the rounded corners of the canbody, the dimensionsv of each being such that when applied to the can-body, in proper position, prior to the double-seaming operation, its edges project a suitable distance beyond the edges of the flanges 1,3 13, in order that the former may be folded under the latter, as

' illustrated in Fig. 7, and each being provided withthe channel or depression 17 forming the shoulder 18 against which the'rim nf the can-body is compressed by the sealing ory double-scanning operation.

Double-scanning machines are well known 4in the art, and need not be described in dethe substantially vertical edge -of thecanx body, the same machine, in the same operation,v will merely downwardly and inwardly roll or fold the edge of the plate` 15 a ainst itself, the steps in this process being s own in Fig. 8.

Solder may be appliedto the falsedoubleseams, if desired, Abut in-asvmuch 'as true double-seaining forms much `the greater ortion of the' joint, and by its interloc ing structure insuresA strength and rigidity throughout the whole-connection including the false double-seamed portions thereof, it is not thought that under ordinary conditions'solderi'ng would be necessary.

It vwill thus be apparent that my invention enables me, .in the lproduction of the so-called fsquare cans, to avail myself of all of the advantages of double-scanning, with none vof the disadvantages attendant. u on an attempt to provide a continuous ange at the end 'of a can-body having sharply'rounded corners. Particular attention is. called to .the fact that by limiting the true double.-

searning to the straight side edges onlyit is possible. to form the 'iangeswhile the sheet 1s in the blank, or'fiat, before the blank is formed into the can-body.

Fig. 5 being a vertical section through-the sides of the can-body, where the flanges 1,3 are present, and Fig. 6 being a section through the corners', where said anges are absent, these figures serve to clearly bring out.the

differences in the character of different portions of the same joint, the result of the same operation. In these figures I have,` for the purposes of illustration, greatly exaggerated the thickness of the metal and the compara' tive. size of theiseam or bead.

. Many modifications of minor details of my improved can willdoubtless readily suggest themselves `to those skilled in the art to which it appertains, and I thereforedonot desire to limit my invention to the specific construction herein shown and described.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent:

1. A sheet-metal container h avingany end y `portion secured to the body portion thereof by a joint consisting of both true and false l double-seams.

2. A sheet-metal container of substantially polygonal cross-sectional configuration, with rounded corners, having an end ortion joined to the body portion or sides-b) tru'e double-seaming along right lines an Valse` double-seaming on curves.`

:3. A sheet-metal container comprising a. body portion formed from a suitable blank Which rovides at one end of said body portion a an e which is cut away at intervals, and an en portion secured to said body portion by a double-seaming operation, whereby the double-seam is false Where said flange has been cut away.

4, A. sheet-metal container comprising a blank bent into a body portion of substantially polygonal cross-sectional configuration, with rounded corners and flanges projecting from thestrai ht side edges only of an open end of said bo y portion, and an end por-tion secured thereto by a double-seaming operation, whereby the resulting doubleseam is false at the rounded corners.

tially rectangular cross-sectional conguration with flanges at each end which do not include bent portions of said body, and end portions each secured to said body portion.

y a double-seaming operation.

6. A sheet-metal container comprising a blank bent into a body portion of substantially rectangular cross-sectional configuration, With rounded corners and flanges at each end projecting from the straight side edges only, and -end ortions the ed es of each of which are fol ed under said and compressed therewith into a bead, Whereby,`at said corners, the edge of the end portion is folded upon itself and pressed against thesideof said body portion. i

In testimony of the foregoing, I have hereunto set my hand in the presence of two witnesses.

JULIUS BRENZINGER. Witnesses l T. E. WEEMS,

.M. F. DICKEL.'

angesA 

